AI Models · Paid vs Paid

GPT-5.6 Sol Paid vs GPT-5.6 Terra Paid

GPT-5.6 Sol vs GPT-5.6 Terra compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.

GPT-5.6 Sol — full profile ›  ·  GPT-5.6 Terra — full profile ›

Prices & specs refreshed from live data · OpenSourceAI.tech

Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.

Choose GPT-5.6 Terra for the lower output price ($15/M vs $30/M). Choose GPT-5.6 Sol if you need the larger 1.1M context window.

GPT-5.6 Sol vs GPT-5.6 Terra specs

SpecGPT-5.6 SolGPT-5.6 Terra
MakerOpenAIOpenAI
TypeProprietaryProprietary
Context window1.1M tokens1.1M tokens
Input price$5/M$2.5/M
Output price$30/M$15/M
Vision / multimodalYesYes
Tool / function callingYesYes
Self-hostableNo (API only)No (API only)
LicenseProprietaryProprietary

Feature comparison

CapabilityGPT-5.6 SolGPT-5.6 Terra
Open weights (downloadable)✗✗
Self-hostable✗✗
Runs fully offline✗✗
Vision / multimodal✓✓
Tool / function calling✓✓
1M+ context window✓✓

Benchmarks: GPT-5.6 Sol vs GPT-5.6 Terra

Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).

GPT-5.6 Sol
GPT-5.6 Terra
Intelligence index
58.9
55
Coding index
77.4
76.7
GPQA
94.1%
92.5%
Humanity's Last Exam
47.2%
41.8%
Long Context Reasoning
73.7%
74%
SciCode
56.1%
53.9%
IFBench
72.7%
71.2%
τ²-Bench
85.1%
86.3%
τ-Bench Banking
33%
31.8%
Terminal-Bench
88%
88%
Terminal-Bench Hard
65.9%
57.6%
Speed
68.5 tok/s
153.9 tok/s
Latency
65.87s
102.59s
Intelligence per $
5.2
9.8

Benchmark data by Artificial Analysis.

How GPT-5.6 Sol and GPT-5.6 Terra score

🤝 Neck and neck on these criteria (3.1 vs 3.1 / 5).
CriterionGPT-5.6 SolGPT-5.6 Terra
Cost-efficiency3.03.0
Context window5.05.0
Openness1.51.5
Self-hosting1.01.0
Multimodality5.05.0

Scores come from live data — output price (cost), context length, open vs closed weights (openness & self-hosting) and vision/tool support (multimodality). Raw task quality isn't scored here; it depends on your benchmark — see the verdict.

What each model is

GPT-5.6 Sol Paid

OpenAI · Proprietary

GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, and agentic workflows, and is particularly strong at command-line and multi-step coding tasks...

GPT-5.6 Terra Paid

OpenAI · Proprietary

GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic...

Frequently asked questions

GPT-5.6 Sol vs GPT-5.6 Terra — which is cheaper?

GPT-5.6 Terra is cheaper on output ($15/M vs $30/M).

Which has the larger context window?

GPT-5.6 Sol offers the larger context window (1.1M tokens).

GPT-5.6 Sol vs GPT-5.6 Terra — which should I pick in 2026?

Choose GPT-5.6 Terra for the lower output price ($15/M vs $30/M). Choose GPT-5.6 Sol if you need the larger 1.1M context window.

People also compare

DeepSeek V4 Flash vs GPT-5.6 SolDeepSeek V4 Flash vs GPT-5.6 TerraGLM 5.2 vs GPT-5.6 SolGLM 5.2 vs GPT-5.6 TerraMiniMax M3 vs GPT-5.6 SolMiniMax M3 vs GPT-5.6 Terra

Explore more open-source AI

Browse the full open-source model leaderboard, thousands of tools and live benchmarks — all in one place.

Open the leaderboard →